Needle chuck for sound reproducers



.J. W. BOOTH NEEDLE CHUCK FOR SOUND REPRODUCERS Filed April 25, 1921 Jim/v M30077).

Patented July 10, 1923.

UNITED STATES a ne GFFl.

hTEEDLF CHUCK F013. SOUND REPRODUCERS.

Original application filed November 1, 192i), Serial No. 421,070. Divided and this application filed April 25,-1921. SerialNo. 464,353.

To all whom it may concern. j

' specification.

Be it known that I, JoI-iN lVnsLnv Boo-TH a subject of. the King of Great Britain, re-

' siding at the town of, Trenton, in the Province of Ontario and Dominion of Canada, have invented certain new and useful Improvements in Needle Chucks for Sound Reproducers, of which the following is a This inventionrelatesto improvements in needle chuck for sound reproducers and the objects of the invention are to provide a simple and effective device for supporting the needle of a talking machine in position and for enabling the position of the needle to be adjusted, and for supporting it in po' sition from the sound box with the utmost freedom of operation.

Further objects are to generally improve and simplify the construction of the device to enable the various parts to better perform the functions required of them. It consists essentially of the improved construction described in detail in the accomherein.

In the drawings 1-- t Figure 1 is a sectional elevation of an embodiment of the invention.

Figure 2 is a cross sectional view showing details of the swivel joint connecting the goose neck and tone arm.

Figure 3 is: a detail of the connecting bracket supporting the vibrating arm.

Figure t is a perspective view showing the chuck and connecting bracket.

Figure 5 is a sectional elevation through the chuck.

Figure 6 is a cross sectional view through the chuck.

Figure 7 is a side view of the supporting; bracket chuck.

In the drawings, like characters of reference indicate corresponding parts in all the figures.

Referring to the drawings:

A indicates the tone arm; B the goose neck; C the sound box; D the chuck and E the needle.

The construction of the sound box and goose neck is the same as that described in my co-pending application Serial No. 421,070 filed November 1st, 1920, from which this application is divided. The present invention relates more particularly to the construction'of the chuck D and the ionanner in which it is connected to the sound F indicates the vibrating arm which is connected at one end to the diaphragm G and at the opposite end to a bracket 65, the construction of which is shown in detail in Figures 3 and 4, the bracket having a perforation 68 to receive the end of the chuck being pivotally supported in position by means of C shaped members 69 which are pivotally connected to the under side ofthe bracket. The C shaped members 69 are provided with hook shaped ends 72 which engage with a notch 73 on the lower side of the sound box, the sound box being provided with a projection 74 which bears against the bracket 65 to opposite projection 71 on the C shaped member 69 which bear against the side of the bracket and thus form an extremely flexible connection. Pivotal connection of the member 69 from the brackets 65 may be accomplished by pivoting the arms to the lugs 76 on the bracket. The chuck D itself comprises an outer sleeve v member 46, an inner sectional core 47 and a clamping sleeve 38. The clamping sleeve has screw threaded engagement with the sleeve 46, the sleeve 38 being provided with threaded recess 38 into which the threaded periphery of the sleeve lti extends. The sleeve 38 is formed at its extremity with an inner tapered sleeve 49 adapted to bear againstcorrespondingly tapered sleeves 50 on the sections of the core member 47, the inner sleeves of the clamp being tapered to bear against the side sleeves of the needle 51, the needle being formed with a plurality of angular sleeves as shown, being triangular in cross section and formed of fibre. The sleeve member 46 is free to turn with respect to the core member through onesixth of a revolution, the extent of the turn being limited by means of a pin 51 on the provided for between the sleeve iii and the core 47 by means of the pin 51* and Slot 52 will permit the core with the needle to be turned in the sleeve 46.

The goose neck B is formed intermediate of its length with. a swivel joint 26 which includes a sleeve like member 27 on one section' of the goose neck, ei'nbracinp; a corresponding but smaller sleeve like section 28 on the opposite part of the gooseneck, the memberQS having arc uate' groo'VesQQ andBO therein in which run pulleys 31 and 32 which form a connection between the ine1nbers27 and 28, the'pulleysbeing retained inposition by means oi" a circular spring 28 which fits Within the member 28 and engages the other sleeves on the pulleys. l

It Will be seen that the slots 29 and 30 extending substantially one-quarter Way around the periphery of the neck 28 Will enablethe sound box to be turned a quarter of a revolution andthe'axis about which it turnsis such that inone position the needle Will be adapted to play a vertically cut record'while in the opposite position it may play a laterally cut record. A corresponding change in position may be made inrthe needle 51 through adjustment "of the clutch as already explained.

As ma-ny'changes could be made in the above construction and many Widely diifere'nt embodiments of'my invention Within the scope of the claim, constructed Without departing from the spirit or s'copefithereofyit isintended that all matter contained in the accompanying specification and drawings shall be interpretedas illustrative and not in a limiting sense.

WhatI claim as my invention In a sound reproducer, a needle, a chuck comprising a core adapted to support the nee'dlefa sleeve adjustably supporting the core and permitting it to turn through part of a revolution whereby the position'of the needle may be adjusted, and means for 'retainingthe core in position in the sleeve.

In witness whereof I. have; hereunto set my handin thepresencefof two witnesses.

' J H ESL 'QQT VVitnessesz I J EAN i OiRounkn, H imsjA R D OZRO BH- 

